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CCZO -- Soil Texture -- Calhoun CZO -- (2015-2016)


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Created: Nov 19, 2019 at 7:09 a.m.
Last updated: Jan 07, 2021 at 6:55 p.m.
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Abstract

These are soil texture data (% sand/silt/clay) for samples collected May-July 2015 and December 2016 in References Areas 1, 4, and 7 during the installation of gas wells. Samples were obtained by coring to depths of 500 cm with a bucket auger. From 50-500 cm, sampling occurred at fixed intervals: 50-100, 100-150, 150-200, 200-250, 250-300, 300-350, 350-400, 400-450, and 450-500 cm. In the upper 50 cm, samples were taken at the following depths: 0-7.5 cm, 7.5-15 cm, 15-30 cm, and 30-50 cm. Extracted soil was mixed on a tarp and sub-sampled in the field. Individual samples were uniquely identified by Reference Area, Gas Well Number, and Depth. Samples were transported to Duke in plastic bags where they were opened and allowed to air-dry for a minimum of 2 weeks. After air-drying, samples were passed multiple times through a #10 sieve (2-mm mesh) to separate soil from > 2-mm fraction. Obtaining pre-sieve bulk soil mass, and post-sieve >2-mm mass, allowed >2-mm mass fraction to be estimated. The < 2-mm fraction was transferred to paper bags for oven-drying at 40C for 48-72 hours. Texture was measured on the oven-dry sample using a standard method based on gravitational sedimentation. The lab SOP is available upon request.

Subject Keywords

Coverage

Spatial

Coordinate System/Geographic Projection:
WGS 84 EPSG:4326
Coordinate Units:
Decimal degrees
Place/Area Name:
Calhoun CZO Research Area 1, Calhoun CZO Research Area 4, Calhoun CZO Research Area 7, Calhoun CZO
North Latitude
34.6115°
East Longitude
-81.6758°
South Latitude
34.5415°
West Longitude
-81.7555°

Temporal

Start Date:
End Date:

Content

ReadMe.md

CCZO -- Soil Texture -- Calhoun CZO -- (2015-2016)


OVERVIEW

Description/Abstract

These are soil texture data (% sand/silt/clay) for samples collected May-July 2015 and December 2016 in References Areas 1, 4, and 7 during the installation of gas wells. Samples were obtained by coring to depths of 500 cm with a bucket auger. From 50-500 cm, sampling occurred at fixed intervals: 50-100, 100-150, 150-200, 200-250, 250-300, 300-350, 350-400, 400-450, and 450-500 cm. In the upper 50 cm, samples were taken at the following depths: 0-7.5 cm, 7.5-15 cm, 15-30 cm, and 30-50 cm. Extracted soil was mixed on a tarp and sub-sampled in the field. Individual samples were uniquely identified by Reference Area, Gas Well Number, and Depth. Samples were transported to Duke in plastic bags where they were opened and allowed to air-dry for a minimum of 2 weeks. After air-drying, samples were passed multiple times through a #10 sieve (2-mm mesh) to separate soil from > 2-mm fraction. Obtaining pre-sieve bulk soil mass, and post-sieve >2-mm mass, allowed >2-mm mass fraction to be estimated. The < 2-mm fraction was transferred to paper bags for oven-drying at 40C for 48-72 hours. Texture was measured on the oven-dry sample using a standard method based on gravitational sedimentation. The lab SOP is available upon request.

Creator/Author

Heine, Paul R

CZOs

Calhoun

Contact

Paul Heine, Duke University, Nicholas School of the Environment, A205 LSRC, Durham, NC 27708. pheine@duke.edu




SUBJECTS

Disciplines

Soil Science / Pedology

Topics

Soil Texture

Keywords

Soil texture|Calhoun|gas wells|texture|sand|silt|clay|pipette method

Variables

Sample ID|Depth (cm)|% clay|% silt|% sand

Variables ODM2

Clay|Sand|Silt|Depth, soil|Recorder code




TEMPORAL

Date Start

2015-05-01

Date End

2016-12-31




SPATIAL

Field Areas

Calhoun CZO Research Area 1|Calhoun CZO Research Area 4|Calhoun CZO Research Area 7

Location

Calhoun CZO

North latitude

34.61146

South latitude

34.541470000000004

West longitude

-81.75554

East longitude

-81.67581




REFERENCE

CZO ID

5564



Additional Metadata

Name Value
czos Calhoun
czo_id 5564
keywords Soil texture, Calhoun, gas wells, texture, sand, silt, clay, pipette method
variables Sample ID, Depth (cm), % clay, % silt, % sand
disciplines Soil Science / Pedology

How to Cite

Heine, P. R. (2021). CCZO -- Soil Texture -- Calhoun CZO -- (2015-2016), HydroShare, http://www.hydroshare.org/resource/1bd22f9415d3461b86f4cf3874e2e1c1

This resource is shared under the Creative Commons Attribution CC BY.

http://creativecommons.org/licenses/by/4.0/
CC-BY

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